From the earliest accounts of warfare, honor has been central to the warrior ethos. But is honor today the same as it was thousands of years ago? From the Iliad to the Peloponnesian War, from the Romans to the Crusaders, and from the Victorians to the soldiers of World War I, honor has shaped warrior’s conduct profoundly. While honor may mean different things to each culture, the core of honor has always been courage on the battlefield, but many facets of the idea, such as of virtue, religion, and how a soldier ought to defend his honor, have changed over time.